Health risk assessment of BTEX compounds (benzene, toluene, ethylbenzene and xylene) in different indoor air using Monte Carlo simulation in zahedan city, Iran

The presence of benzene, toluene, ethylbenzene, and xylene compounds (BTEX) in the breathing air outside inside buildings is one most significant problems related to human health today. This study was performed determine concentration BTEX pollutants indoor environments. PhoCheck used detect compounds. In this study, (BTEX pollutant) assessed four spaces, including restaurants, laundries, hair salons, photocopying centers. results showed that average all searched higher than recommended limit Environmental Protection Agency (EPA). carcinogenic risk assessment by benzene ethylbenzene show 2153 × 10−4 913 10−5 respectively. HQ values for toluene were 1.397 0.505, respectively, indicating exposure alone may have adverse effects on health, while has no effects. hazard index (HI) one. An HI value means two contaminants we breathe health. As a result, necessary control measures should be taken prevent unfavorable these pollutants.